某型离心压缩机半开式叶轮强度分析  

Strength Analysis on a Centrifugal Compressor Semi⁃Open Impeller

作　　者：杨锐 戴雄 YANG Rui;DAI Xiong(Shanghai Turbine Works Co.,Ltd.,Shanghai 200240,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]上海汽轮机厂有限公司,上海200240 [2]西安交通大学能源与动力工程学院,西安710049

出　　处：《热力透平》2024年第4期227-231,共5页Thermal Turbine

摘　　要：根据某型2级离心压缩机结构设计方案,基于Abaqus建立了2级半开式叶轮周期循环对称模型,给定适当的载荷和位移约束条件,通过有限元仿真计算得到了静强度和频率计算结果。结果表明:压缩机叶轮的主要载荷为离心力,在设计方案快速迭代的过程中,对模型仅施加离心力所得到的应力结果依然具有极高的参考价值;2级叶轮的应力分布规律非常接近,大小叶片出气侧区域在离心力的作用下具有翻折倾向,造成叶片根部一侧受压,另一侧受拉;2级叶轮最大Mises应力均出现在叶轮出气侧区域,可以通过调整结构方案降低该区域的应力值。同时,通过调整静子导叶数量,避免了第2级叶轮在17000 r/min转速工况下的共振。研究成果可以为离心压缩机叶轮的设计提供参考。According to the structure design of a two⁃stage centrifugal compressor,a periodic cycle symmetry model of the two⁃stage semi⁃open impeller was established based on Abaqus.Given appropriate boundary condition and displacement constraints,the static strength and frequency results were obtained through finite element calculation.The results showed that the main load of the compressor impeller was centrifugal load,and the stress results obtained with the only load of centrifugal force in the model still had high reference value in the process of rapid design iteration.The stress distribution of the two impeller stages was similar,and the outlet side of rotating blades had a tendency to bend,resulting in pressure on one side of the blade root and tension on the other side.The maximum Mises stresses of the two impeller stages were both located on the outlet side,which could be reduced by adjusting the structure design.Meanwhile,by changing the number of stator guide vanes,the resonance of the second stage impeller at 17000 r/min was eliminated.The research results can provide reference for impeller design in centrifugal compressor.

关 键 词：压缩机 半开式 叶轮 强度分析 

分 类 号：TH452[机械工程—机械制造及自动化]